AD 52-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B, 47B3, 47D and 47D1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47B, 47B3, 47D and 47D1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47B, 47B3, 47D and 47D1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Model 47B, 47B3, 47D and 47D1 Helicopters |
Unsafe Condition
Blade Grip Adapter Locks (P/N 47-120-154-1) may shear due to insufficient tensile strength if the adapters loosen.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove existing lockwire or blade grip adapter locks (P/N 47-120-154-1), check torque between 3,000-3,300 inch-pounds, and install revised locks (P/N 47-120-154-2).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next 300-hour overhaul, but not later than March 1, 1952
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 47B, 47B3, 47D Helicopters and Model 47D1 Helicopters Serial Numbers 145 to 164, Inclusive.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.